string与bytes相互转化

按uft-8形式编码   

a=’hello world’
b=a.encode(encoding=’utf-8’)
print(type(a), tyoding=’utf-8’)
print(c, type(c))

按gbk方式编码

x=a.encode(encoding=’gbk’)
print(x, type(x))
y=x.decode()
print(y, type(y))